This chemistry wordoku recognises the chemist who discovered quasicrystals!

Solve this wordoku in the same way as a sudoku with letters instead of numbers (each of the nine letters in each row, column and nine-square cell). Once solved, one of the overall diagonals can be rearranged to give the surname of a Nobel laureate whose contribution to chemistry involved rethinking the field of crystallography to understand non-periodic crystals.

This week’s letters are: A C E H I M N S T